Instead of crashing when opening a binary file, an error message is now instead printed in terminal.

src/source.cc

@@ -39,7 +39,8 @@ Glib::RefPtr<Gsv::Language> Source::guess_language(const boost::filesystem::path
 Source::View::View(const boost::filesystem::path &file_path): file_path(file_path) {
   set_smart_home_end(Gsv::SMART_HOME_END_BEFORE);
   get_source_buffer()->begin_not_undoable_action();
-  juci::filesystem::read(file_path, get_buffer());
+  if(!juci::filesystem::read(file_path, get_buffer()))
+    Singleton::terminal()->print("Error: "+file_path.string()+" is not a valid UTF-8 file.\n");
   get_source_buffer()->end_not_undoable_action();
   get_buffer()->place_cursor(get_buffer()->get_iter_at_offset(0)); 
   search_settings = gtk_source_search_settings_new();

src/sourcefile.cc

@@ -20,8 +20,15 @@ bool juci::filesystem::read(const std::string &path, Glib::RefPtr<Gtk::TextBuffe
   if(input) {
     std::vector<char> buffer(buffer_size);
     size_t read_length;
-    while((read_length=input.read(&buffer[0], buffer_size).gcount())>0)
+    while((read_length=input.read(&buffer[0], buffer_size).gcount())>0) {
-      text_buffer->insert_at_cursor(&buffer[0], &buffer[read_length]);
+      auto ustr=Glib::ustring(std::string(&buffer[0], read_length));
+      if(ustr.validate())
+        text_buffer->insert_at_cursor(ustr);
+      else {
+        input.close();
+        return false;
+      }
+    }
     input.close();
     return true;
   }